Reinforced-concrete bridge structure.



M o. 111111111511. REINFORCE-D CONCRETE BRIDGE STRUCTURE.

APPLICATION FILED AUG.24. |914. I 1,237,615.- Paten1edAug-211917.

arranAfYS STARS y lVIILO O. BURNETT, OF MARENGO, IOWA.

1" i y REINFoRoEn-oonennrn BRIDGE STRUCTURE.

Specification of LettersiPatent.

Patented A110. 21, 1917.v

Application filed August 24, 1914. Serial No. 858,319.

To all whom it may concern.'

Be it kn'own that I, MILo O. BURNETT, a citizen of Marengo, in the county of Iowa and State of Iowa, have'invented a certain new and useful Reinforced-Concrete Bridge Structure, of which the following is a specification.

` in ditches where it is desired to have the road bed considerably above the bottom of the ditch, and where it is desired to fill up a portion of the ditch which has been washed deeper than it should be, which structurev is so built and arranged as to furnish proper supporting means and a proper passage way for the water, and is also so constructed as to cause the filling up of the ditch above theJ bridge by the deposit of sediment and l the like, and also to cause the filling up of the lower part of the bridge structure between its ends.

My invention consists in certain details in the construction, combination and arrangement of the various parts of the device, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claims and illustrated in the accompanying drawings, in which:

Figure 1 shows an end elevation of a reinforced concrete bridge structure, embodying my invention.

Fig. 2 shows a top or same.

Fig. 3 shows a vertical sectional view taken on the line 3-3 of Fig. 1.

Fig. 4 shows a vertical sectional view taken on the line 4-4 of Fig. 2.

In the accompanying drawings I have used the reference numeral 10 to indicate a wall and spaced walls of my improved bridge structure, which are adapted to be placed in a ditch or the like, the outlines of which are indicated by the heavy dotted lines in Fig. 4.

The walls 10 are arranged longitudinally of the ditch, and are connected at their upper edges by a horizontal top or cover 11.

At their lower ends the walls 10 supply support and proper foundations 12. It will be understood that the walls 10 and 11 are preferably made of reinforced concrete. Y,

plan view of the At the up-strea1n ends of wallslO, they are connected by a tie ,wall 13, preferably built integral with the walls 10 in ordinary concrete forms, and made .of reinforced concrete.

The wall .13 extends only part way to the top 11, leaving in the up-stream end of the bridge a substantiallyrectangular opening 14 for the passage of water.

Substantially midway between the ends of the walls 10 is a second tie wall 14a, similar in size and construction to the wall 13.

At the down-stream end of said side walls 10 is a third tie wall 15, similar to the walls 13 and 14a. y

At the side edges of the top 11 are preferably provided upward eXtensions 16, which may be made in the formA of bridge railings if desired.

At the down-stream side of the bridge at the lower ends of the walls 10 and 15 is formed a platform or apron 17 to receive the flowing water and prevent the washing awayl of ground below the bridge.

The ditch portions 18 on each side of the bridge may be filled in in any suitable way.

It will thus be seen that there is left a passage way for water` through the openings 14, which is considerably higher than the bottom of the ditch as above kbriefly mentioned. It frequently occurs that a ditch cuts deeper than is desired on account of the washingof the ground, and it is sometimes very ydesirable to fill in the ditch and prevent further washing. A bridge built like the one herein described makes it necessary for the water to rise to a considerable height before passing through the ditch, and yet oers a discharge passage for the water at such a height that the water does not overflow the banks of the ditch.

It is also obvious that with a bridge constructed as herein shown,the tendency will be for dirt and the like carried by the water to settle in the ditch above the bridge, and fill up the ditch to the height of the wall 13, when dirt will then gradually pass over the wall 13, filling the space between the walls 13 and 14a and later on between the walls 14a and 15.

It will thus be seen that when the bridge is completed it will have a strong, deep foundation, ter has continued for some time, the bridge will be made considerably stronger by illing the spaces between the walls' 13, 14 and. 15.

At the same time the ditch will be filled up and further washing will be prevented.

To prevent the washing out of the dirt in the ditch at the sides of the bridge7 the wing walls 19 are provided at the down-stream endof the bridge, extending laterally a sufi- `cient" distance to fill the ditch and to furnish a supporting wall for the dirt and other material lled into the portions 18 of the bridge'. The ywing walls 19 are supv ported upon foundations 20'.

v4.Copies of this patent may lie' obtained for The wing walls near their lower parts are preferably provided with drain openings,

having mounted therein drain tile E21,` for draining-material filled into the spaces 18.

I Claim as my invention.

v1.In a bridge structure having spaced abutments and a roadway connecting the upper edges` thereof, a plurality of parttin' walls extended between the abutments and having their yupper edges alined with the predetermined stream level.

2.y In a device of the class desoribed, a

pair of spaced parallel abutments',"and a plu-k W. R. MAGGREGOR, A. M. UTTE.

vecents each, by addressing the Commissioner oi aften'ts; Washington, D. C. 

